The cycling thread Page 155

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  • sport 28 Sep 2012 11:56:59 13,959 posts
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    What do you guys reckon?

    Ebay listing for Giant TCR Frame

    Link - goo.gl/TXwdb

    In description:

    "Small crack near rear brake bracket, this looks to be only in the lacquer and not structural damage."

    Could be taking a chance, but cracks in carbon frames are bad right?

    Edited by sport at 11:57:33 28-09-2012

    Edited by sport at 11:58:09 28-09-2012
  • elstoof 28 Sep 2012 12:04:33 18,493 posts
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    I doubt the lacquer or paint would just "crack" without some damage underneath, chips or flakes fair enough. What the reason for selling? Looks like he's kept the forks so I'm guessing its a junker.
  • sport 28 Sep 2012 12:08:59 13,959 posts
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    elstoof wrote:
    I doubt the lacquer or paint would just "crack" without some damage underneath, chips or flakes fair enough. What the reason for selling? Looks like he's kept the forks so I'm guessing its a junker.
    yeah, kinda my gut feeling too.....hmrpf!
  • elstoof 28 Sep 2012 12:15:46 18,493 posts
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    You can fix carbon successfully though, there's a couple of places that'll do it. HQ Carbon or something up in Norwich do it, a friend had great results with them when they replaced a seat stay.
  • MikeP 28 Sep 2012 15:33:50 2,809 posts
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    IMO there's no way that crack on the right-hand seat stay above the rear brake boss is cosmetic. The lacquer would only crack like that due to underlying movement. It's not a scratch, something has made the underlying structure move in a bad way. You can see the way it's propagated around the joint.

    That looks like a deathtrap, tbh, and probably not economic to fix.

    Edited by MikeP at 15:34:50 28-09-2012
  • pistol 28 Sep 2012 16:08:28 13,018 posts
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    sport wrote:
    What do you guys reckon?

    Ebay listing for Giant TCR Frame

    Link - goo.gl/TXwdb

    In description:

    "Small crack near rear brake bracket, this looks to be only in the lacquer and not structural damage."

    Could be taking a chance, but cracks in carbon frames are bad right?

    Edited by sport at 11:57:33 28-09-2012
    Personally I wouldn't risk it Sport.
  • Psychotext 28 Sep 2012 16:15:08 61,813 posts
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    Aye, that's taken a hard hit at some point.
  • sport 28 Sep 2012 16:16:40 13,959 posts
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    Yeah, decided against it. Cheers all
  • urban 29 Sep 2012 15:27:14 12,980 posts
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    Buying one of these tomorrow for £250

    Dad phoned me last night and said he'd been out to see it, the guy even washes it every time he gets back from riding it!
  • sport 30 Sep 2012 11:12:53 13,959 posts
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    Ok - another ebay listing I'm interested in - need forum feedback

    GIANT TCR CARBON FRAME AND FORKS

    link - http://goo.gl/IYcej

    Seems ok - not sure about the clamp comment.




    PS. Please don't snipe me :-(
  • elstoof 30 Sep 2012 13:13:50 18,493 posts
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    There's 2 ways of putting a front derailleur on the frame, clamp on and braze on.

    Clamp on has a ring that goes around the seat tube and is tightened like those things plumbers use on water pipes, the derailleur then bolts onto it.

    Braze on has a mounting point built (used to be "brazed" to steel frames) into the frame and the derailleur bolts to that.
  • urban 30 Sep 2012 15:10:43 12,980 posts
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    I bought that bike at 10am this morning, only just got back from taking it for a 'wee spin' is what I told my old man.

    5 hours later and ooophttt, this is the first racer I've owned. They are so much god damn fun!

    There's a long straight that comes into my town before you hit a hump bridge, there was a little Corsa car dick that accelerated alongside me, realising we couldn't both get over the bridge at the same time he dropped back a little. I dropped down a few to get up the hump, clicked back up when coming down and jesus...It just wanted to go!

    Gave it a little wobble and I came down the other side doing what felt like 40-45.

    Bye bye Corsa



    Gotta watch myself though, I looked back a few times and lost concentration on my balance, got a little wobble. Balance wise they are a lot more sensitive to change.

    Helmet, seat swap and new pedals (horrible cages on it atm) and it'll be a beautiful weekend rider.

    Edited by urban at 15:12:08 30-09-2012
  • MikeP 30 Sep 2012 15:57:08 2,809 posts
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    sport wrote:
    Ok - another ebay listing I'm interested in - need forum feedback

    GIANT TCR CARBON FRAME AND FORKS

    link - http://goo.gl/IYcej

    Seems ok - not sure about the clamp comment.

    PS. Please don't snipe me :-(
    Wouldn't dream of it - very ungentlemanly :)

    Sorry to be the voice of doom and gloom here, but bulging can mean the due to the overtightened clamp the carbon has failed internally. This is one of the problems with CF, the layered structure means it can go wrong in non-visible ways.

    http://www.carbonframerepair.com/index.php/damage-you-cant-see/

    Honestly, the most valuable investment you can make if you buy a carbon bike is a torque wrench.

    Edited by MikeP at 15:58:37 30-09-2012
  • sport 30 Sep 2012 16:33:46 13,959 posts
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    hmmm....seems that with carbon frames:

    a) Don't buy used unless you can personally inspect it first.
    b) You need to know your shit about carbon frames when inspecting.

    Think I'll pass. If I had a couple of hundred quid to lose I might have taken a chance but I don't.

    Thanks Mike
  • MikeP 30 Sep 2012 18:02:09 2,809 posts
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    @sport Yeah, it's a tricky one.

    I actually do own a second-hand full carbon bike, but I got it via the CTC forum, and met the guy, inspected and rode the bike before I handed over any cash.

    He had all the receipts and manuals for it, and it was in good nick. It's served me very well for the last couple of years, with some minor maintenance as and when parts have worn out.

    Sadly on eBay there are too many people, innocently or otherwise, who don't clearly describe the condition of their items. I've bought a couple of bikes off there that with some TLC have turned out fine, but they were either beaters or steel frames.

    Personally I wouldn't buy a carbon bike sight unseen, and ideally I'd take a knowledgeable friend along too, preferably one with a level head :)
  • mal 30 Sep 2012 18:07:54 28,288 posts
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    @urban Very envious. How small does that top tube go by the seat post? Blimey!
  • urban 30 Sep 2012 18:31:04 12,980 posts
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    @mal Not bad for £250 is it!?

    Goes from about 5cm tall to 2cm skinny by the seat post. Had a lot of fun on it today, Buying a white bike might actually encourage me to keep it washed!
  • MikeP 30 Sep 2012 21:12:44 2,809 posts
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    I start my week-long frame and fork building course tomorrow. I'm going to try to document the process here:

    http://tubesandlugs.tumblr.com/
  • elstoof 30 Sep 2012 21:27:04 18,493 posts
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    Put me on the order list when full production starts old chap :D
  • MikeP 30 Sep 2012 22:35:31 2,809 posts
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    Post deleted
  • urban 1 Oct 2012 21:36:16 12,980 posts
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    Is this thread missing like a good couple pages?

    nvm there they are

    Edited by urban at 21:36:36 01-10-2012
  • urban 5 Oct 2012 16:36:45 12,980 posts
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    @MikeP Making for some good reading bud!
  • Psychotext 5 Oct 2012 16:49:54 61,813 posts
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    I'd forgotten about that. I'll have to go back and have a look.
  • elstoof 5 Oct 2012 16:54:04 18,493 posts
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    I discovered that a client of mine over in California is big into cycling, he's sent me some pictures of his latest hand built steel frame and its a beauty. The guy building it is called Brian Baylis, he's been waiting over 5 years as he produces about 4 frames a year. Found some other stuff he's done:

    Here -> http://www.classicrendezvous.com/USA/Baylis_/Baylis_green_Hellenic.htm

    Look at the lugs on that!
  • urban 5 Oct 2012 17:00:23 12,980 posts
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    oooopht lugs!
  • billythekid 5 Oct 2012 17:10:14 12,168 posts
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    Fucking dog has chewed through my front brake hose >:(
  • Psychotext 5 Oct 2012 17:21:22 61,813 posts
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    4 year old kid goes mountain biking, with awesome results: http://www.youtube.com/watch?v=0qmQrEM5rVA&feature=player_embedded

    :D

    Edit - lol, your dog is a retard.

    Edited by Psychotext at 19:29:11 05-10-2012
  • MikeP 5 Oct 2012 21:59:00 2,809 posts
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    elstoof wrote:
    I discovered that a client of mine over in California is big into cycling, he's sent me some pictures of his latest hand built steel frame and its a beauty. The guy building it is called Brian Baylis, he's been waiting over 5 years as he produces about 4 frames a year. Found some other stuff he's done:

    Here -> http://www.classicrendezvous.com/USA/Baylis_/Baylis_green_Hellenic.htm

    Look at the lugs on that!
    Ok, so I can now say with some actual experience under my belt that those lugs are going to involve some ridiculously technical brazing!

    I've almost finished building my frame, hopefully by the end of tomorrow I'll have a frame and fork.
  • elstoof 5 Oct 2012 22:10:56 18,493 posts
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    Good stuff Mike, looking forward to the finished article. Would you recommend the course?

    I hate to think what the Baylis frame costs, I'd imagine its fairly steep considering he's living off 4 sales per year. Looking into his background it seems he started up Masi bikes in the 70's, I've heard of them here and there, so he's got a good 40 years experience or so.

    A bit closer to home there's also Mercian bikes in Sheffield doing some lovely lugwork, their Vincitore Special is a beaut.

    http://www.merciancycles.co.uk/frames/37/vincitore-vincitore-special
  • MikeP 8 Oct 2012 13:56:50 2,809 posts
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    Well, I finished the frame and fork. However, I have some very mixed feelings about the course.

    I would judge myself (without being too boastful) as being pretty competent when it comes to making things. But 6 days feels incredibly short, and there's no time to get back on track if anything goes wrong. Which, as novices, they will.

    I ended up with a frame that's straight and rideable, but still needs finishing off and has several mistakes. However, seeing as a week ago I'd never even picked up an oxy-acetylene torch or done any real metalwork that's probably a pretty big achievement.

    I feel now that I could safely go on and build my own frame and fork independently, and that if I worked on it I'd get a lot neater. I am a bit of a perfectionist, but I was so tired that by the end of Saturday I actually felt disheartened, rather than pleased. Which isn't like me.

    I'll post some pics up soon.

    The problem is that there really are very few people who teach it. There's Downland, where I went, The Bicycle Academy, and Dave Yates. However, the latter is booked up until into 2014.

    The guys at Downland are obviously skilled fabricactors, but it wasn't really the student - tutor kind of deal I was anticipating. If it was my course I wouldn't run it the way they did. They are thinking of doing a two week "pro" course next year, but I think that's actually probably more realistic for the beginner course. I want to know why I'm doing something, as well as just doing it - I felt I was pumping them for information at times.
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